<template>
  <el-card>
    <el-form label-width="120px" :model="formData" :rules="rules" ref="addForm">
      <el-form-item label="属性名" prop="specsname">
        <el-input placeholder="请输入属性名" v-model="formData.specsname"></el-input>
      </el-form-item>
      <el-form-item label="属性值" prop="attrs">
        <div class="attr-item" v-for="(item,index) in attrList" :key="index">
          <el-input placeholder="请输入属性值" v-model="item.value"></el-input>
          <el-button type="success" v-if="index==0" @click="addAttr">添加</el-button>
          <el-button type="danger" v-else @click="delAttr(index)">移除</el-button>
        </div>
      </el-form-item>
      <el-form-item label="状态" prop="status">
        <el-radio-group v-model="formData.status">
          <el-radio :label="1">正常</el-radio>
          <el-radio :label="2">禁用</el-radio>
        </el-radio-group>
      </el-form-item>
      <el-form-item>
        <el-button @click="submitForm" type="primary">立即更新</el-button>
      </el-form-item>
    </el-form>
  </el-card>
</template>

<script>
import { getSpecsById } from "../../request/specs";
export default {
  data() {
    //   自定义表单校验规则
    var validateAttr = (rule, value, callback) => {
      // console.log(this.attrList);
      this.attrList.forEach(item => {
        if (item.value == "") {
          callback(new Error("请输入属性值!"));
        }
      });
      // 无论成功与否, 都应该调用callback
      callback();
    };
    return {
      // 定义数据模型
      formData: {
        // 获取当前被编辑的规格id
        id: this.$route.params.id,
        specsname: "", //属性名称
        attrs: "", // 属性值
        status: 1 // 状态
      },
      attrList: [{ value: "" }],
      // 表单校验规则
      rules: {
        specsname: { required: true, message: "请输入属性名", trigger: "blur" },
        //自定义的表单校验规则
        attrs: { validator: validateAttr, trigger: "blur" },
        status: { required: true, message: "请选择状态", trigger: "blur" }
      }
    };
  },
  methods: {
    addAttr() {
      if (this.attrList.length >= 5) {
        return false;
      }
      this.attrList.push({ value: "" });
    },
    delAttr(index) {
      this.attrList.splice(index, 1);
    },
    //   提交表单
    submitForm() {
      this.$refs.addForm.validate(async valid => {
        if (valid) {
          this.formData.attrs = this.attrList.map(item => item.value).join(",");
          const res = await this.$http.post("/api/specsedit", this.formData);
          if (res.code == 200) {
            this.$router.push("/specs");
            return this.$success("更新成功");
          }
          this.$error("更新失败");
        }
      });
    },
    async getSpecsInfo() {
      const list = await getSpecsById(this.formData.id);
      if(list){
        // 更新数据
        this.formData=list[0];
        // ['2.0L','2.5L']=>[{value:'2.0L'},{value:'2.5L'}]
        this.attrList=list[0].attrs.map(item=>({value:item}));
      }
    }
  },
  created(){
      this.getSpecsInfo();
  }
};
</script>

<style scoped>
/* 
样式添加作用域的原理:
给style标签添加scoped属性之后, 当前组件中样式选择器会被改写,改写成一个交集选择器, 类似这样.box => .box[data-v-7059db36]
 */
.el-form {
  width: 600px;
  margin: auto;
}
.attr-item {
  display: flex;
  width: 400px;
  margin: 5px 0;
  justify-content: space-between;
}
.attr-item .el-input {
  width: 320px;
}
</style>